Paper-bag machine.



PAPER BAG MACHINE.

APPLICATION FILED P3116, 1910.

1,020,773. Patented Mar. 19, 1912.

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PAPER BAG MACHINE.

APPLICATION FILED FEB. 16, 1910.

1,020,773, Patented Mar. 19, 1912.

18 SHEETS-SHEET 2.

INVENTOR- WITNESSES v COLUMBIA PLANOORAPN C0.,WASMIHOTON. D c

ArT'y 7" PAPER BAG MACHINE.

APPLIUATION FILED PEBJB, 1910.

1,020,773. I Patented Mar. 19, 1912.

18 BHEETS-SHEET 3.

INVENTOR WITNESSES Za W 3% 6 PAPER BAG MACHINE.

APPLICATION TILED PEBJG. 1910.

1,020,773. Patented Mar.19, 1912.

18 BHEETS-SHEET 4.

INVENTOR coumum PLANOORAPH CO.,WASHINGTON. D. C

PAPER BAG MACHINE.

APPLICATION FILED Hume, 1910 1,020,773. Patented Mar. 19, 1912.

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Patented Mar. 19,1912.

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Patented Mar. 19; 1912.

18 SHEETS-SHEET 8.

INVENT'DR WITNESSES COLUMBIA FLANOCIRAI'M 1:0..WA5IIINOTON, u. c.

I PAPER BAG MACHINE. APPLICATION FILED mums, 1910.

Patented Mar. 19, 1912.

18 SHEETS-SHEET 9.

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PAPER BAG MACHINE.

APPLIOATION FILED FBB.16, 1010.

vPatented Mar. 19, 1912.

18 SHEETS-SHEET 10.

INVENTOR WITNESSES w. AM W A-rf') w PAPER BAG MAOHINE.

APYLIOATION FILED IElLlfi, 1910. 1,020,773. Patented Mar.19,1912.

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INVENTOR WNEMES awmjw APPLICATION FILED YER; 16, 1910. 1,020,773. Patented Mar. 19, 1912.

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wnwvssszs A-rrfy COLUMBIA PLANOGHAPN CO..WASMINOTON. u, C.

E. F. MfiLLER.

PAPER BAG MACHINE.

APPLIUATION FILED PEBJG, 1910.

Patented Mar. 19, 1912.

111 SHEETE-SHEET 1s.

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APPLIOATION FILED IIIBJG, 1910.

Patented Mar.19, 1912.

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V E. F. MULLER.

PAPER BAG MACHINE.

APPLICATION FILED IBBJB, 1910.

1,020,773. Patented Mar. 19, 1912.

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PAPER BAG MACHINE.

APPLIOAIION FILED rmms, 1010.

Patentd Mar. 19, 1912.

16 BHEETS-S HEET 16.

R o T N E v N V E. F. MiiLLBR.

I PAPER BAG MACHINE.

APPLIOATION FILED 1118.16, 1910.

1,020,773. Patented Mar.19, 1912.

18 BHEBTB-8HEET 18.

vvn-wzssss YMMWE EDUARD FELIX Mtl'LLER, OF LEIPZIG-LINDENAU, GERMANY.

PAPER-BAG MACHINE.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application filed February 16, 1910. Serial No. 544,295.

To all whom it may concern:

Be it known that I, Enema) FELIX Min.- LER, a subject of the King of Saxony, residing at Frankfurterstrasse 36. Leipzig-Lindenau, Germany, have invented new and useful Improvements in Paper-Bag Machines, of which the following is a specification.

This invention relates to a machine for automatically manufacturing paper bags, and as herein shown and described is especially adapted to manufacture those bags known in commerce as square-bottmn or self-opening paper bags, the same being a bag comprising a tucked paper tube, the right-angular fold bent inward and the rectangular bottom folded back upon the tube.

The general organization or principle of the machine is similar to that of the machine described in the specification of Letters-Patent No. 920076 and No. 940183, and the novel features consist in improvements and simplifications of the several devices by means of which the blanks are manipulated.

A construction embodying these improvements will now be described with reference to the annexed drawings, in which- Figure 1 is a general side-view of the machine; Figs. 2 to 4 show the feed-rollers for the paper tube, in operative and inoperative position. Figs. 5 to 7 show the spreading mechanism for spreading the tucked paper tubes to allow of the entrance of tongues in the side folds. Figs. 8 to 10 show the devices for forming the. box-like bottom.

' Fig. 11 is a section of the rotary drum, with the means for producing the so-called diamond fold the two flaps and the closing member; details of these devices are shown in Figs. 12 to 17. Figs. 18 to 22 show the means for folding over the two bottom flaps, the several steps of this operation being illustrated in Figs. 26 to 33. Figs. 23 to 25 show the same arrangements in somewhat altered and simpler form. Figs. 34 to 42 show the means for delivering the finished bag from the machine.

General organization of the machine. The paper from which the bags are to be made is wound upon the roll 1, which is controlled by means of a disengageable brake 2, balanced by a weight 3, in order to uniformly tension the strip of paper. The paper passes over an elastically supported roller 41-, and thence between a roller 5 and a roller 6 which applies adhesive. Then the paper passes to apparatus 7 by which it is formed'in the known manner into a bellowssided or tucked tube. Beyond the apparatus 7 there are two rollers 8 and 9, the function of which is to feed the tube of paper to the cutting mechanism 40 and rotary drum 13. The grippers 4 1 of the drum seize the front end of the tube at the moment at which the latter is cut by the knives 11 and 12 (Fig. 1) and thus cut off a bag blank. Before the grippers engage the tube, the folded sides of the tube are spread by means of a device locatcd between the feed rollers 8 and 9 and the cutter 40 (Figs. 6 and 7), to allow of the entrance of tongues 15 and 16 for forming the bottom (Figs. 8 and 9). These tongues are inserted and rotated in the folds, to impart a box-like shape to the tail of the blank engaged by the grippers, before the blank is carried by drum to the next manipulative device. The next operation is the formation of the flaps, for which purpose the box-like shape of the tail or bottom is converted into diamond shape, the closing member being cut out at the same time (Figs. 13 to 17). The bottom then passes under a smoothing roller 101 (Figs. 1 and 11) and receives an application of adhesive from a roller 102. whereupon it passes to the flapfolder, which successively folds over the front and the fastening flap (Figs. 18 to 33). The bag is then pressed by a presser 151 (Fig. 1) and then the gripper is opened and the bag engaged by the delivery mechanism and delivered to the conveyor 202.

The several manipulative devices which act upon the tube of paper in the course of its transformation into bags will now be described in detail.

F eed-mechanism.-The rollers 8 and 9, the function of which is to feed the paper-tube to the drum 43, are fixed to shafts 10 and 11; these shafts carry gear-wheels 15 and 16, normally in mesh with each other, and the shaft 10 also carries a gear-wheel 14 in engagement with the driving mechanism of the machine. The wheel 14- may be changeable, for the purpose of regulating the rate of feed. (Fig. 2.) To prevent deflection or distortion of the tube by the feed-mechanism it is essential that the roller 9 be uniformly pressed against the roller 8. For this purpose there is provided, at each side of the device, a spring 20, arranged in a casing carried by curved arms 19; this spring is regulat-able by means of a screw 21 and bears against the bearings 17 of the shaft 11,

the said bearings being mounted on a shaft 18, to which the arms 19 are fixed (Fig. 3). The arms 19 have a downward, curved extension, the end of which is so positioned under the bearings 17, that it lifts the bearings, wit-h the roller 11, when the shaft 18 is rocked by means of a lever 22 (Fig. 4). The roller 11 is lifted, as described, for the purpose of conveniently placing the paper in position prior to the starting of the machine. The lever 22 carries a spring-pressed pin 23, by means of which it can be alternatively engaged with perforated parts of the frame at 24 and 25, in its end positions.

Tube-ewpcmding tZcoice.-This is the device for spreading the tucked tube, for the insertion of the slidable tongues 45 and 46 used for the preliminary step of forming the bottom. The device comprises a vertically movable plate 26 (Figs. 5, 6, 7) on which are two tongues 27 laterally adjustable by means of a screw spindle 28 with right and left hand threads, the adjustment being made according to the size of the bag to be produced. These tongues enter the folds of the tube, and immediately after the severance of a blank the plate is lowered, so that the tongues 27 open the folds of the tube behind the severed blank, in order that two fingers 38 beyond the cutter can enter the folds and hold them open for the entrance of another pair of tongues 45 and 46. hen the fingers 38 have entered the folds the plate 27 ascends and allows the tube to contract, so that the tube is in a flat state when the knives 41 and 42 are brought together to cut off another blank. The plate 26 rests upon a rod 29 having bearing in a sleeve at the end of a lever 30 rotatable about the shaft 10. The rod 29 is connected to a lever 33, by a rod 32 provided with a regulating screw 31. The lever 33 is pivoted to the frame 13 and is actuated by a cam 34, the latter being loose on a shaft 35 and connected to a gear wheel in engagement with the driving gear. The rod 32 has a longitudinal slot, by means of which it is guided on rod 29, so that the plate 26 can be moved downward in case of disarrangement of the tube. For holding the rod 29 against the regulating screw 31, and thus pressing up the plate 26, a spring 36 attached to the frame is connected to a lever 37 fixed to the rod 29. The fingers 38 are fixed with their ends nearly in contact with the revolving drum 43; they are adjustable, according to the width of the bag, on a holder 39 mounted on the shaft 35. At the moment at which a blank is severed from the tube by the rotating knives 41, 42 (Figs. 1 and 7), the front end of the blank is engaged by grippers in the drum, the tail end, from which the bottom is to be formed, remaining free. The grippers 44 are opened and closed by means of a toothed segment 60 mounted with the upper gripper-jaw on a shaft 61 (Figs. 9 and 11). The segment 60 meshes with a segment 62 integral with a lever carrying a roller which rides upon a fixed cam, not shown in the drawing. The drum 43 has a ring of teeth 64 in engagement with the pinion 166 of the driving shaft 167.

The first operation performed on the blank is the operation of imparting a boxlike shape to the bottom-piece. This is effected by turning the tongues 45 and 46, which are slidable on a rod 47 (Fig. 10). These tongues are moved inward by abutments 48 fixed to holders 51 (Fig. 8). The latter are carried by bolts 52 slidable in holes in the frame 13, and are laterally adjustable by means of screw-spindles 49, for regulating the depth to which the tongues enter the folds of the blank. The abutments are rigidly connected to slotted guides 50 in which guides the nuts of the screw bolts 52 adjust the abutments radially to allow of timing the action of the tongues according to the width of the blank. Each tongue 46 carries a small pinion 53 meshing with a toothed segment 54 fixed to a shaft 55 (Figs. 8 and 9). The shaft is rotated by means of a lever 56, which carries a roller 57 engaged with a fixed box-cam indicated in dotted lines in Fig. 9. By rotation of the shaft 55 the tongues 46 are rotated, and by this means the box-shape is imparted to the tail end of the blank. The segments 54 have projections (Fig. 10) by which the tongues 45 are thrust away from the circumference of the drum, in order to prevent displacement of the blank when the tongues are entering the side folds of the blank. Springs 59 fixed at 58 pull the tongues 45 back to normal position.

The box-shape of the tail end must be converted into the so-called diamond shape for the purpose of formation of the bottomfiaps. For this purpose a finger 65 (Fig. 12) is swung into the box by means of a shaft 66 which is rocked by means of a lever 67, rod 68 and crank-pin 7O fixed to a toothed wheel 69 (Fig. 13). The purpose of the finger 65 is to adequately widen the bottom for the entrance of a reciprocating and rocking finger 71 and a finger 72 which also acts as a knife (Figs. 13 and 14). These fingers 71 and 72 rock with a casing 74 fixed to a shaft 73, the rocking movement being imparted by a lever 75 rigidly connected to shaft 73 which is boxed in frame 13. Lever 75 carries a roller 76 (Fig. 17) in engagement with a box-cam 77 fixed to a shaft 78; the gear-wheel 69 on the latter meshes with the teeth 64 of the drum. In addition to its rocking movement the sliding finger 71 receives reciprocating movement by means of a carriage 79 travel ing with rollers 80 upon a rail 81 fixed to casing 74 (Figs. 14 and 16). The carriage 

